Your deck is bad and you should feel bad.

[Cheesy111]

Presenting...

Control: "Wow, too much of a coward to play a deck with real creatures? Just going to deck me out because you're not good enough to beat me?"

Domin: "Noob has to kill all my creatures to beat me instead of facing me head-on like a man."

Aggro: "Make a real deck that takes some skill instead of just putting together a bunch of creatures.  L2P."

Unique deck: "You only won through luck, my deck is clearly better and tested."

Common deck: "You can't make your own good deck so you copy someone else's.  Well done."

Special mention to...

Spoiler for Hidden:

Monoaether: Hiding behind Dim Shields is for noobs who can't use real cards.

[TribalTrouble]

OTK: "Wow, too much of a Chapuz to play a deck that shows its face like a man? Just going to make the game go forever and then kill me when I could've ended this 10 turns ago?"

[whatifidogetcaught?]

Any sort of Mono: "How uncreative and boring. That doesn't take any skill."

[ARTHANASIOS]

Stall: If you're so afraid to face me, go to your mommy instead of hiding behind your "wooden" shields and your pitiful healing!

Quanta Denial: Being afraid of letting me playing ANY kind of card makes you just pathetic! Once again, if you're scared go to your mommy.

Monos: Learn how to play more than a single element and then maybe, just maybe, you're ready to face me... noob!

Duos: Just putting two elements together at random won't make a difference; you're still a loser.

Trios: What a failure! Every sane ETG player knows that trios never work!

Quartets: Same with Trios...

Rainbow: Just putting together a few cards of each element and relying on RNG to draw the right ones is not going to work, noob! RNG licker!

Pillarless: The fail! You don't even know what Pillars and Pendulums do!

Shard Golem: Oh, what a super ETG player! Just randomly put a few Shards together and just randomy summon a Shard Golem. Learn how to play instead of licking RNG, noob!

[eaglgenes101]

Break: Learn to take the initiative rather than turtling through opposition, coward.

[pikachufan2164]

Combo (essentially OTK in Elements): "Go play solitaire instead."

[Absol]

I should make another chart for this.

[Pineapple]

Fun deck: "Why are you having fun?"

[eaglgenes101]

Serious deck: This is a game, stop treating it like it's not.

[andretimpa]

Ragequit deck: ^#&*($*#&^(@*#&$!!!!

[TribalTrouble]

It's a Trap! : Noob stop playing with your dollies and fight like a man!

[Chapuz]

Antimatter + Adrenaline: cheater!!! cheater!!!